Search and detection of pulsars in the monitoring observations at the frequency 111 MHz

TL;DR

This study reports the discovery of 18 new pulsars through four years of monitoring observations at 111 MHz, utilizing Fourier analysis and high-resolution follow-up observations to identify pulsar candidates.

Contribution

The paper introduces a method combining long-term Fourier analysis with high-resolution follow-up to detect new pulsars in a specific declination and right ascension range.

Findings

Discovered 18 new pulsars.

Developed a two-stage detection process.

Validated candidates with high-resolution analysis.

Abstract

Pulsars with periods more than 0.4 seconds in the declination range -9o < decj < 42o and in the right ascension range 0h < r.a.< 24h were searched in parallel with the program of interplanetary scintillations monitoring of a large number of sources with the radiotelescope LPA LPI. Four-year observations carried out at the central frequency 110.25 MHz in the band 2.5 MHz and in six frequency channels with the time resolution 100 ms were used for the search. Initial detections of candidates for pulsars were based on the Fourier power spectra averaged over the whole observations period. The candidates for pulsars were checked in more details from observations analysis with higher time-frequency resolution: 32 frequency channels with time resolution of 12.5 ms. 18 new pulsars was discovered, their main characteristics are presented.